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Models › upstage › Upstage: Solar Pro 4

Upstage: Solar Pro 4 — pricing & benchmarks

By upstage · Updated 2026-07-24 · cheap high-volumestep-by-step reasoning

Upstage: Solar Pro 4 costs $0.03 per 1M input tokens and $0.12 per 1M output tokens, with a 524K context window. It is best suited for cheap high-volume, step-by-step reasoning, and is available through one OpenAI-compatible Appmo API key.
$0.03Input / 1M
$0.12Output / 1M
524KContext
—Intelligence
—Coding
—GPQA %
—Speed tok/s

What Upstage: Solar Pro 4 is used for

Upstage: Solar Pro 4 is best suited for cheap high-volume, step-by-step reasoning. Access it through one Appmo API key alongside 390 other models — Appmo's optimizer can route to it automatically when it is the best value for a request.

Use it via the Appmo API (OpenAI-compatible)

curl https://appmo.com/v1/chat/completions \
  -H "Authorization: Bearer $APPMO_KEY" \
  -d '{"model":"upstage/solar-pro4","messages":[{"role":"user","content":"Hello"}]}'

FAQ

How much does Upstage: Solar Pro 4 cost?
Upstage: Solar Pro 4 costs $0.03 per 1M input tokens and $0.12 per 1M output tokens ($0.053 blended), as of 2026-07-24. Prices are expected to fall as competition increases.

What is Upstage: Solar Pro 4 best for?
Upstage: Solar Pro 4 is best suited for cheap high-volume, step-by-step reasoning.

How do I use Upstage: Solar Pro 4?
Send requests to Appmo's OpenAI-compatible endpoint with model id "upstage/solar-pro4" and one API key — no separate provider account needed.